newman



@uiten tsta gstnt @frn A. M. NEWMAN, or TERRE HAUTE, INDIANA.

Letters Pate-nt No. 82,240, dated September 15, 1868.

IMPROVEMENT IN SAW-'SHARPENING DEVICE.

dige Stimuli referat tu im time glitters 33mm :mt mating gmt uf tlgsame.

TO ALL WHOM IT MAY CGNCERN:

Be it known that I, A. M. NEWMAN, of Terre Haute, in the county of Vigo,and in the State of Indiana, have invented certain new and usefulImprovements in Saw-Filing Machine; anddo hereby declare that thefollowing is a. full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon.

The nature of my invention consists in placing two les in aslide orframe, in such a manner that a saw may be filed with perfect ease, andhave all its teeth of the same pitch.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation. I

In theannexed drawings,'i`orming part of this specification, Arepresents a slotted bar, forming thc top of a frame, ofi-which thestandards B B are the sides. This bar is grooved underneath, (groovemarked 11,) for the upper ends of the standards to slide inhackwards'and forwards, the said upper ends being bent, at right angles.

from the standards, inwards, and fastened tothe barV A, at any pointdesired, by means of" screws c c, passing through theslots a a; on thehar, and into the said upper ends of the standards B B. i

The lower ends of the standards form the heads C'C, which extend on eachside thereof, and arc provided on the inside with washers e e, intowhich the ends ofthe files E E are inserted. i v

Through the centre of the heads a rod, d, passes, which is fastened toone of the -handles I), and on its other end provided withscrew-threads, which fit into a female screw in the other handle, sothat when thc ends of the les are inserted into the washersv e e, byturning this handle, they are screwed firmly into any position desired,after whichthe standards B B are tightened or screwed to Athe bar A bythe screws c c, as before mentioned. i

From t'ne centre of the bar A, two guides, z', extend downward, whichguides rest on the rodd, and can oe placed at any angle desired, for apurpose hereafter to be mentioned.

F represents a slide7 which rests on the teeth of the saw to be filed,as shown in {igi 2, and which isiprovided on its upper side with a pinor lug,f.

When'a saw is to be filed, the slide is placed on the saw, and one ofthe les'bctwcen the two first teeth and the bar A, against the pin orlugf onthe slide. The machine is then turned, so that the saw may becomeparallel to one of the guides By placing one of the guides z' at suchangle to the rod d as may be desired, and holding thcsaw parallel to it,the teeth w-ill all get exactly the same fleam or pitch.

Having thus fully described my invention, what I claim as new, anddesire to secure by Lettere Patent, is

1. The adjustable standards B B, provided with heads C C, and washers cc,- for the purpose of scouring the files, and adapting the machine todifferent-sized files, substantially as and for thc purposes herein setforth.

2. The combination of the slotted bar A, standards B B, handles D, rodd, and guides iz', constructed and operating substantially as and forthe purposes herein set forth.

'In testimony that I claim the foregoing, I have hereunto set my hand,this 20th day of April, 1868.

' A. M. NEWMAN.

Witnesses:

RICHARD DUNIGAN, f A. C. DUNnUnGn.

